I do find it amazing how short memories some fans have.
Mancini started at City with a 442. Something the board had been (wrongly IMO) crying out for ever since the Sven days. Wasn't working, so he went to 451 against Stoke and it worked. Fans applauded him. Stayed 451 for the game at Wolves, wasnt working. Switched to 442 and it worked.
Cue the 442 for a number of weeks where we also steam rolled Blackburn, only to fall short badly against Everton, where Fellaini murdered us. 442 doesnt work you cried... its obvious we have to go back to 451/433. Such was the manner of the defeat, Mancini didn't feel he could trust Barry and De Jong against United, so switched to 451 with 3 "defensive" midfielders. And guess what, we won that night, so he stuck with it at Old Trafford where we narrowly lost and had more than enough chances to at least take the tie to extra time.
The United game had a huge effect on morale, and we were down in the dumps for a good month following that. You asked for Ireland, he gave you Ireland... who flopped against Stoke. The morale stayed low until the Chelsea game, where we played... 451 with three defensive midfielders. AJ looked poor there, and SWP played well enough to retain his spot so it was as you were against Sunderland. So please stop with the revisionist shit about 1) fielding too negative a side when the facts show that we've got more results playing this way under Mancini and 2) SWP shouldn't have started over AJ.
The truth is Mancini doesn't have the personnel to play how he likes, so it's a weekly struggle to find his best team on any given week. This is confounded by the fact we do not have enough quality in central midfield. He wanted Mariga and Vieira for a reason, as he recognised rightly that the midfield is our weakest position by a country mile. We have no options there - if Barry isn't playing well there is nobody to replace him. If Ireland isn't playing well there isn't anybody to replace him in that position. United have Carrick, Anderson, Scholes, Fletcher, Gibson, Hargreaves... if one of them isn't playing well, as Carrick wasn't earlier in the season he loses his place. If one of them is injured, like Hargreaves, there is quality to replace him. Same at Chelsea with Lampard, Essien, Mikel, Cole, Ballack all capable of playing in the middle. We don't have that luxury and it's killed us this year.